混凝土结构的弹性徐变应力计算,多用迭加理论(又称弹性徐变体理论)与流动理论(或老化理论)。国内以迭加理论的应用为多。上述二理论的假定均以常荷载的徐变曲线为依据。本文根据混凝土在变荷载下的弹性、迟后弹性与粘性特征,作出积分核的组成形式。对徐变方程进行了求解,讨论了三种核的应力松弛结果。 The elastic creep stress of concrete structures is calculated using the superposition theory (also known as the elastic Xu variant theory) and the flow theory (or aging theory). There are many applications of superposition theory in China. The assumptions of the above two theories are based on the creep curves of the normal load. In this paper, based on the elasticity, late elasticity and viscous characteristics of concrete under varying loads, the integral form of the integral kernel is made. The creep equations were solved and the stress relaxation results of the three cores were discussed.